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  • Nitrided VS Bimetallic Barrels/Cylinders


    Nitrided plasticating barrels are manufactured typically from SACM645 or similar steels with elements to enhance nitrided depth. The barrel is treated using either a gas-nitriding or ion-nitriding process. Gas-nitriding is the more common method. It is less expensive than the ion process. The typical gas-nitrided barrel bore has a shallow case hard depth of about 0.05 - 0.1mm, while the typical ion-nitrided bore is hardened to a depth of about .015 inch. Hardness and wear resistance diminishes with depth and wear rate accelerates with operation time. This causes other components such as the feed screw to wear at a faster rate as well. The depth of wear protection for a bimetallic barrel is .050-.062 inch.

    Nitrided Advantages

    Nitride barrels have a low cost
    Easy to manufacture
    Nitriding can be used for complex geometries such as ID grooves, twin bores and auxiliary components.
    Nitrided Disadvantages
    Thin layer of wear protection
    Short peak performance life
    Low wear resistance
    Not cost effective
    TizaTech produces nitrided cylinders, when the cylinder wall is too thin for the spin-casting process.  Also for complex geometries such as grooved liners, certain twin bore barrels, feed and end components. We prefer to supply the superior wear resistance of bimetal

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